AV Multi-Vu Control Box Adds Underwater Camera Functionality To Any RCA-Enabled Sonar Or TV/LCD Another first from Aqua-Vuthe original Underwater Viewing SystemMulti-Vu adds underwater camera and video functionality to any RCA-enabled sonar or TV/LCD monitor. Multi-Vu is ideal for viewing underwater video on your boats sonar or for use in permanent ice fishing shelter applications. Multi-Vu includes Camera Control Box with waterproof 12-volt power supply cable, video out, on/off switch and camera light controls. Works with Aqua-Vu, Marcum and Vexilar underwater cameras.